WO2019132128A1 - Tôle d'acier électrique non orienté et son procédé de production - Google Patents

Tôle d'acier électrique non orienté et son procédé de production Download PDF

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Publication number
WO2019132128A1
WO2019132128A1 PCT/KR2018/005622 KR2018005622W WO2019132128A1 WO 2019132128 A1 WO2019132128 A1 WO 2019132128A1 KR 2018005622 W KR2018005622 W KR 2018005622W WO 2019132128 A1 WO2019132128 A1 WO 2019132128A1
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Prior art keywords
steel sheet
less
weight
oriented electrical
electrical steel
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PCT/KR2018/005622
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English (en)
Korean (ko)
Inventor
김재훈
김원진
김용수
신수용
Original Assignee
주식회사 포스코
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Priority to CN201880084859.1A priority Critical patent/CN111566231B/zh
Priority to EP18894426.8A priority patent/EP3733901A4/fr
Priority to JP2020536063A priority patent/JP7299893B2/ja
Priority to US16/957,834 priority patent/US11773463B2/en
Publication of WO2019132128A1 publication Critical patent/WO2019132128A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1233—Cold rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1222—Hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
    • C21D8/1272—Final recrystallisation annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/14766—Fe-Si based alloys
    • H01F1/14775—Fe-Si based alloys in the form of sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/16—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets

Definitions

  • Non-oriented electrical steel sheet and manufacturing method thereof are non-oriented electrical steel sheet and manufacturing method thereof.
  • non-oriented electrical steel sheet and its manufacturing method. And more particularly, to a non-oriented electrical steel sheet having a high magnetic permeability, a low iron loss and a high magnetic flux density by controlling mutually the content of segregated elements contained in the steel sheet, and a method for manufacturing the same.
  • An embodiment of the present invention is to provide a magnetic steel sheet with improved magnetic properties by minimizing fine impurities such as inclusions and fine strands without reinforcement of secondary refining in steel making, and a method of manufacturing the same.
  • Another embodiment of the present invention is to provide a non-oriented electrical steel sheet having excellent productivity as well as excellent magnetic properties and a method of manufacturing the same.
  • the non-oriented electrical steel sheet according to an embodiment of the present invention may comprise, by weight%: 2.0
  • the non-oriented electrical steel sheet according to an embodiment of the present invention may include 1 x 1 - 0.0005 to 0.02% and V. 0.0005 to 0.01%.
  • the non-oriented electrical steel sheet according to one embodiment of the present invention can satisfy the following formula (2).
  • the non-oriented electrical steel sheet according to one embodiment of the present invention has the following formula 2019/132128 1 »(: 1 ⁇ ⁇ 2018/005622
  • the non-oriented electrical steel sheet according to one embodiment of the present invention contains 0.0040% or less (excluding 0%), 0: 0.0040% or less, (Excluding 0%), not more than 0.0040% (excluding 0%), not more than 0.0030% (excluding 0%), ⁇ : not more than 0.0030% (excluding 0%), and not more than 0.0040% (Exclusive of 0%).
  • the non-oriented electrical steel sheet according to one embodiment of the present invention includes inclusions, and the inclusions having a diameter of 0.5 to 1.0 may be 40 vol% or more of the total inclusions.
  • the inclusions having a diameter of 2 or less may be 80 vol% or more of the total inclusions.
  • the non-oriented electrical steel sheet according to an embodiment of the present invention includes inclusions, and the area of the entirety of the inclusions may be 0.2% or less with respect to the area of the entire non-oriented electrical steel sheet.
  • a method of manufacturing a non-oriented electrical steel sheet according to an embodiment of the present invention includes: 2.0 to 3.5% by weight, 0.3 to 3.5% by weight, 0.2 to 4.5%, 3 ⁇ 4 :
  • a method of manufacturing a slab comprising the steps of: preparing a slab containing inevitable impurities and satisfying the following formula (1), heating the slab, hot rolling the slab to produce a hot rolled sheet, rolling the hot rolled sheet to manufacture a hot rolled steel plate, And a final annealing step.
  • the slab can satisfy the following expression (2).
  • the slab can satisfy the following formula 3.
  • the non-oriented electrical steel sheet according to one embodiment of the present invention includes the specific gravity of 11 and the improved range of the molten steel cleanliness, and the inclusions and precipitates are coarsened.
  • the side seokwon timestamp 511 by the addition of lead I 3 improves the texture by the high-frequency iron loss is improved, and the author field characteristics can be produced a non-oriented electrical steel sheet suitable for high speed rotation.
  • Fig. 1 is an enlarged photograph of an inclusion in a directional electric steel sheet produced in Example (Category 1). Fig.
  • first, second and third, etc. are used to describe various portions, components, regions, layers and / or sections, but are not limited thereto. These terms are only used to distinguish any moiety, element, region, layer or section from another moiety, moiety, region, layer or section. Accordingly, the first portion, component, region, layer or section described below should not be interpreted as limiting the scope of the present invention 2019/132128 1 »(: 1 ⁇ ⁇ 2018/005622
  • any part is referred to as being 'on', "above” or “the other part 10, which can be can be directly on or above the other part, or accompanied by other parts in between.
  • the other part when referring to a part being "directly above” another part, no other part is interposed therebetween.
  • the meaning of further including additional elements means that iron is replaced by an additional amount of additional elements.
  • the composition in the non-oriented electrical steel sheet is not-oriented electrical steel sheet
  • the non-oriented electrical steel sheet according to one embodiment of the present invention may contain 2.0 to 3.5% by weight, 0.3 to 3.5% by weight, 0.2 to 4.5% by weight,
  • Silicon () serves to lower the iron loss by increasing the specific resistance of the material, and when added too little, the effect of improving the high frequency iron loss may be insufficient. On the contrary, when the amount is too high, the hardness of the material increases, and the rolling resistance at the time of extrusion is extremely deteriorated, so that the productivity and punchability may be deteriorated. Therefore, the above range can be added. More specifically from 2.3 to 3.3% by weight.
  • Aluminum (s) plays a role of lowering the iron loss by increasing the resistivity of the material, and if it is added too little, it is not effective in reduction of the high frequency iron loss, and the nitride is formed finely and the magnetism can be lowered. On the other hand, if it is added too much, problems may occur in all processes such as steelmaking and continuous casting, and productivity may be greatly lowered. Therefore, the time can be added in the above-mentioned range. More specifically, it may contain 0.5 to 3.3% by weight.
  • Manganese (3 ⁇ 4) will increase the resistivity of the material and serve to improve the iron loss forms a sulfide, and if too little is added 1 is finely precipitated can degrade the magnetic properties. Conversely, if too much is added, the magnetic flux density may be reduced by promoting the formation of [111] texture which is disadvantageous to magnetism. therefore
  • Tin (3 ⁇ 4), antimony (3 ⁇ 4) improve the texture of the material and surface oxidation 2019/132128 1 »(: 1 ⁇ ⁇ 2018/005622
  • the non-oriented electrical steel sheet according to one embodiment of the present invention satisfies the following formula (1).
  • the value of the formula 1 When the value of the formula 1 is less than 0.05, the aggregate structure in which the ⁇ 111> direction unfavorable to magnetism is excessively segregated in I 3 and lies parallel to the normal direction of the steel sheet rolling direction (direction) / ≪ / RTI > texture) may be promoted and the magnetism may be degraded.
  • the value of the formula (1) is more than 25, the crystal grain growth property is lowered and the effect of improving the texture is not obtained and the annealing temperature becomes too high, and the productivity of annealing may be lowered.
  • Zinc 1 ⁇ 2 11 reacts with the impurity elements to improve the cleanliness of the molten steel. If it is added too little, it may not play a role of enhancing the cleanliness of molten steel by coarsening inclusions and the like. Conversely, if too much is added, the formation of fine streaks will be promoted. Therefore, 3 ⁇ 4 can be added in the above range.
  • Yttrium is additionally added to serve as an additive to assist in the inclusion of 3 ⁇ 4.
  • adding gypsum it plays a role of reducing inclusions of 3 ⁇ 4 and inhibiting inclusions redissolution occurring in the subsequent annealing process to reduce fine gypsum. If it is added in too much amount, it may induce the formation of fine strands and lower iron loss.
  • one or more of the following can be included. That is, only 3 ⁇ 4 may be included alone, or only 3 ⁇ 4 may be included, and
  • weight may be included in an amount of 0.0005 to 0.01% by weight. 11 and, if present, may contain 0.0005 to 0.02% by weight and 0.0005 to 0.01% by weight, respectively. Concretely, it includes 3 ⁇ 4 and 0.0005 to 0.02% by weight of 3 ⁇ 4 and 0.0005 to 0.01% by weight of 3 ⁇ 4. More specifically, 0.001 to 0.01% by weight and 0.0007 to 0.005% by weight of urethane may be contained.
  • Nitrogen forms fine fine precipitates within the base material and forms fine nitrides by binding with other impurities to inhibit grain growth and deteriorate iron loss. Therefore, it is limited to 0.0040 wt% or less, more specifically 0.0030 wt% or less It is good to do.
  • Carbon (X) causes self-aging and combines with other impurity elements to generate carbides, thereby deteriorating the magnetic properties. Therefore, it is preferable to limit the amount of carbon to 0.0040 wt% or less, more specifically 0.0030 wt% or less.
  • Hwang It is preferable to control it to 0.0040 wt% or less because it plays a role of reducing sulfide to reduce grain growth and suppressing the magnetic domain migration. More specifically 0.0030 wt% or less.
  • titanium () plays a role of suppressing grain growth and magnetic domain formation by forming carbide or nitride, it is preferably limited to 0.0040% by weight or less, more specifically 0.0020% by weight or less.
  • ⁇ 0.0040% by weight or less.
  • the niobium () plays a role of suppressing the growth of grain growth and the magnetic domain formation by forming carbide or nitride, so it is preferable to limit it to 0.0040% by weight or less, more specifically 0.0020% by weight or less.
  • V 0.0040% by weight or less
  • the vanadium (V) functions to suppress the grain growth and the magnetic domain formation by forming carbide or nitride, so it is preferable to limit the vanadium (V) to 0.0040 wt% or less, more specifically 0.0020 wt% or less.
  • the magnitude of the inclusions is appropriately controlled by adding a specified amount of segregation elements 8? 1 and? 3 together with? 1 and?, Thereby ultimately improving the magnetic properties of the non-oriented electrical steel sheet.
  • the non-oriented electrical steel sheet according to an embodiment of the present invention may have an inclusion having a diameter of 0.5 to 1.0 / pie at 40 vol% or more of the total inclusion.
  • the diameter of the inclusions means a diameter of the circle assuming a virtual circle having the same area as the inclusions. These inclusions improve magnetic domain mobility and exhibit excellent magnetic properties. More specifically, inclusions having a diameter of 2 or less may be 80 vol% or more of the total inclusions.
  • the non-oriented electrical steel sheet includes inclusions, and the total area of the inclusions may be 0.2% or less with respect to the area of the entire non-oriented electrical steel sheet.
  • the non-oriented electrical steel sheet according to an embodiment of the present invention may have an average crystal grain diameter of 50 to 95. [ The magnetic properties of the non-oriented electrical steel sheet are superior in the above-mentioned range.
  • the non-oriented electrical steel sheet according to one embodiment of the present invention improves high-frequency iron loss and authorship characteristics. Specifically, the magnetic flux density at the rate of 50/100/100 is greater than that of the liver, and the ratio of high frequency iron loss (1000/10000 3 ⁇ 4
  • the reason why the addition ratio of each composition in the slab is limited is the same as the reason for limiting the composition of the non-oriented electrical steel sheet described above, so repeated description is omitted.
  • the composition of the slab is substantially the same as that of the non-oriented electrical steel sheet because the composition of the slab does not substantially change during the manufacturing process such as hot rolling, hot rolling annealing, cold rolling and final annealing, which will be described later.
  • the inert gas may be a gas.
  • the step of bubbling may be performed 3 ⁇ 4 1, 3 ⁇ 4, 3 ⁇ 4, I 3 , such as 5 minutes or more bubbling ⁇ ratio) to react fully.
  • the slab is charged into a heating furnace and heated to 1100 to 12501 ° C.
  • the precipitate is redissolved and may be precipitated finely after hot rolling.
  • the heated slab is hot-rolled to 2 to 2.3 ⁇ ⁇ to produce a hot-rolled sheet.
  • the finishing rolling temperature may be 800 to 1000.
  • the step of annealing the hot-rolled steel sheet may further include the step of annealing the hot-rolled steel sheet.
  • the hot-rolled sheet annealing temperature may be 850 to 115010. If the annealing temperature of the hot-rolled sheet is less than 8501, the structure does not grow or grows finely and the synergistic effect of magnetic flux density is small. If the annealing temperature exceeds 11501, the magnetic properties are rather lowered, Can be bad. More specifically, the temperature range may be 950 to 1125 mm. More specifically, the annealing temperature of the hot-rolled sheet is 900 to 1100 (:). Hot-rolled sheet annealing 2019/132128 1 »(: 1 ⁇ ⁇ 2018/005622
  • the hot rolled sheet is pickled and rolled to a predetermined thickness. It can be applied differently depending on the thickness of the hot rolled sheet, but can be rolled to a final thickness of 0.2 to 0.6 ⁇ ⁇ by applying a reduction ratio of 70 to 95%.
  • Final annealing is performed so that the average thickness of the crystal grains is 50 to 95 degrees.
  • the final annealing temperature may be 850 to 1050. If the final annealing temperature is too low, recrystallization may not occur sufficiently, and if the final annealing temperature is too high, rapid growth of crystal grains may occur and the magnetic flux density and high-frequency iron loss may be lowered. More specifically, final annealing can be performed at a temperature of 900 to 1000 ° (:). In the final annealing process, all of the processed structures formed in the pre-stage rolling stage can be recycled (i.e., more than 99%).
  • the steel sheet After final annealing, the steel sheet can be cooled at a cooling rate of 25 to 50 ° (: / sec to 600 °). By cooling at an appropriate cooling rate, coarsening of inclusions can be promoted.
  • the non-oriented electrical steel sheet produced may have an inclusion having a diameter of 0.5 to 1.0 in an amount of 40 vol% or more of the total inclusion.
  • the inclusions having a diameter of 2 II or less may be 80 vol% or more of the total inclusion.
  • the total area of the inclusions may be 0.2% or less with respect to the area of the entire non-oriented electrical steel sheet.
  • a 3 ⁇ 4 1 ⁇ 2 ⁇ 61 6 to determine the rolling direction and a mean value in the vertical direction are shown in Table 3 below. Inclusions were observed using an optical microscope, a magnification is 500 times the surface, observed is a cross-section 01) side) of rolling in the vertical direction, the area was observed for at least 4 at least 2 TM.
  • Fig. 1 shows a photograph of the inclusions of the embodiment (division 1). Diameters of inclusions are expressed by their diameters assuming circles of the same area. Area ratios of inclusions having diameters of 0.5 to 1.0 ⁇ with respect to the total area of inclusions are summarized in Table 3 below.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
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  • Crystallography & Structural Chemistry (AREA)
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  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Dispersion Chemistry (AREA)
  • Power Engineering (AREA)
  • Soft Magnetic Materials (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)

Abstract

L'invention concerne, selon un mode de réalisation, une tôle d'acier électrique non orienté qui comprend, en % en poids, 2,0 à 3,5 % de Si et/ou 0,3 à 3,5 % d'Al et/ou 0,2 à 4,5 % de Mn et/ou 0,0030 à 0,2 % de Sn et/ou 0,0030 à 0,15 % de Sb et/ou 0,0040 à 0,18 % de P et/ou 0,0005 à 0,02 % de Zn et/ou 0,0005 à 0,01 % de Y, le reste étant constitué de Fe et des inévitables impuretés, et qui est conforme à la formule [1]. Formule [1] : 0,05 ≤ ([Sn] + [Sb])/[P] ≤ 25 ([Sn], [Sb] et [P] indiquant, respectivement, la teneur (en % en poids) en Sn, Sb et P)
PCT/KR2018/005622 2017-12-26 2018-05-16 Tôle d'acier électrique non orienté et son procédé de production WO2019132128A1 (fr)

Priority Applications (4)

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CN201880084859.1A CN111566231B (zh) 2017-12-26 2018-05-16 无取向电工钢板及其制造方法
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4053302A4 (fr) * 2019-10-29 2022-09-07 JFE Steel Corporation Tôle d'acier électromagnétique à grains non orientés et son procédé de production

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101901313B1 (ko) * 2016-12-19 2018-09-21 주식회사 포스코 무방향성 전기강판 및 그 제조방법
KR102018181B1 (ko) 2017-12-26 2019-09-04 주식회사 포스코 무방향성 전기강판 및 그 제조방법
KR102009393B1 (ko) 2017-12-26 2019-08-09 주식회사 포스코 무방향성 전기강판 및 그 제조방법

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5258080A (en) * 1989-12-06 1993-11-02 Ebg Gesellschaft Fur Elektromagnetische Werkstoffe Non-oriented electrical strip and process for its production
JP2007039721A (ja) * 2005-08-01 2007-02-15 Sumitomo Metal Ind Ltd 回転子用無方向性電磁鋼板の製造方法
KR101059577B1 (ko) * 2002-05-15 2011-08-26 티센크루프 스틸 유럽 악티엔게젤샤프트 무방향성 전기 강판 및 그 제조 방법
KR20130140208A (ko) * 2012-02-14 2013-12-23 신닛테츠스미킨 카부시키카이샤 무방향성 전자 강판
US20150000794A1 (en) * 2012-03-26 2015-01-01 Baoshan Iron & Steel Co., Ltd. Non-Oriented Silicon Steel and Its Manufacturing Method

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2998676B2 (ja) * 1997-01-27 2000-01-11 日本鋼管株式会社 Ｓｉ拡散浸透処理法により製造される加工性の優れた高珪素鋼板
JP3430833B2 (ja) * 1997-01-31 2003-07-28 Ｊｆｅスチール株式会社 歪み取り焼鈍後の磁気特性に優れる無方向性電磁鋼板およびその製造方法
JP3421536B2 (ja) * 1997-05-12 2003-06-30 Ｊｆｅスチール株式会社 磁気特性に優れる無方向性電磁鋼板およびその製造方法
KR100479992B1 (ko) 1999-09-22 2005-03-30 주식회사 포스코 자성이 우수한 무방향성 전기강판 및 그 제조방법
JP2001335897A (ja) 2000-05-24 2001-12-04 Kawasaki Steel Corp 加工性およびリサイクル性に優れた低鉄損かつ高磁束密度の無方向性電磁鋼板
CN101218362B (zh) * 2005-07-07 2010-05-12 住友金属工业株式会社 无方向性电磁钢板及其制造方法
JP4779474B2 (ja) 2005-07-07 2011-09-28 住友金属工業株式会社 回転子用無方向性電磁鋼板およびその製造方法
JP4979904B2 (ja) 2005-07-28 2012-07-18 新日本製鐵株式会社 電磁鋼板の製造方法
JP5712863B2 (ja) 2011-08-23 2015-05-07 新日鐵住金株式会社 無方向性電磁鋼板の製造方法
KR20140060727A (ko) 2012-11-12 2014-05-21 주식회사 포스코 무방향성 전기강판 및 그 제조방법
JP5975076B2 (ja) 2014-08-27 2016-08-23 Ｊｆｅスチール株式会社 無方向性電磁鋼板およびその製造方法
PL3239326T3 (pl) * 2014-12-24 2020-06-29 Posco Blacha cienka z niezorientowanej stali elektrotechnicznej oraz sposób jej wytwarzania
JP6627226B2 (ja) * 2015-02-24 2020-01-08 日本製鉄株式会社 無方向性電磁鋼板の製造方法
KR20150045993A (ko) 2015-04-17 2015-04-29 주식회사 포스코 무방향성 전기강판 및 그 제조방법
KR101701194B1 (ko) 2015-12-23 2017-02-01 주식회사 포스코 무방향성 전기강판 및 그 제조방법
KR102175064B1 (ko) 2015-12-23 2020-11-05 주식회사 포스코 무방향성 전기강판 및 그 제조방법
KR101902438B1 (ko) 2016-12-19 2018-09-28 주식회사 포스코 무방향성 전기강판 및 그 제조방법
KR101901313B1 (ko) 2016-12-19 2018-09-21 주식회사 포스코 무방향성 전기강판 및 그 제조방법
KR102018181B1 (ko) 2017-12-26 2019-09-04 주식회사 포스코 무방향성 전기강판 및 그 제조방법
KR102009393B1 (ko) 2017-12-26 2019-08-09 주식회사 포스코 무방향성 전기강판 및 그 제조방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5258080A (en) * 1989-12-06 1993-11-02 Ebg Gesellschaft Fur Elektromagnetische Werkstoffe Non-oriented electrical strip and process for its production
KR101059577B1 (ko) * 2002-05-15 2011-08-26 티센크루프 스틸 유럽 악티엔게젤샤프트 무방향성 전기 강판 및 그 제조 방법
JP2007039721A (ja) * 2005-08-01 2007-02-15 Sumitomo Metal Ind Ltd 回転子用無方向性電磁鋼板の製造方法
KR20130140208A (ko) * 2012-02-14 2013-12-23 신닛테츠스미킨 카부시키카이샤 무방향성 전자 강판
US20150000794A1 (en) * 2012-03-26 2015-01-01 Baoshan Iron & Steel Co., Ltd. Non-Oriented Silicon Steel and Its Manufacturing Method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4053302A4 (fr) * 2019-10-29 2022-09-07 JFE Steel Corporation Tôle d'acier électromagnétique à grains non orientés et son procédé de production

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